Power System Flexibility Metrics Evaluation and Power Ramping Analysis for High Variable Renewable Generation Shares

• Main Authors: M. Eltohamy, M. Moteleb, Hossam Talaat, S. Mekhemer, Walid Omran
• Format: Article
• Language: English
• Published: European Alliance for Innovation (EAI) 2021-01-01
• Series: EAI Endorsed Transactions on Energy Web
• Subjects: power system flexibility; flexibility metrics; variable renewable generation (vrg); power ramping analysis
• Online Access: https://eudl.eu/pdf/10.4108/eai.13-7-2018.165282

The increased penetrations from variable renewable generation (VRG), such as solar and wind, into power systems,growing the flexibility requirements for managing the uncertainty and variability of output power. These flexibilityrequirements can be achieved by many flexibility options. However, quantifying the flexibility available and required in apower system is a complicated problem. The paper reviews different flexibility metrics that measure the flexibility available from each conventional generator and that measure the flexibility available and needed by a power system at either planning and operational stages. Due to the dynamics of power systems, no flexibility metric has been taken as astandard. Accordingly, for high variable renewable generation shares, it is necessary to have a deeper understanding ofpower ramping scale as well as times when collective ramp events are most likely to occur. The paper introduces amethod for power ramping analysis that will be demonstrated by analysing the output power of aggregated Belgianwind farms. In addition, the ramp characteristic indicators have been proposed for comparing the ramping behaviour ofVRG in different years or between different countries.